This is plastic frame retardant candle molds. Sturdy material won't interact with fragrance or dyes. These wax melt cases are sturdy, with a tight seal to ensure candles stay fresh. Perfect for most types of wax and create fun for DIY candle lovers. It will give you nice using experience. Features - Material: PC. - Size: 4.50X4.00X2.00cm/1.77X1.57X0.79inch. - The candle shells are flame-retardant, you do not need to worry about it will burn when using it to making candles. - The Xmas DIY candle cup is simple and modern in look, adding artistic flavor to your home. - It is made from material, which can be used for a long period. You can use it with confidence. - Though the candle making container is simple in design, it's very practical when you use it, lightweight and easy to carry. - You can send it to your families and friends as a gift, they will be happy, especially for those candle DIY lovers. Package list: 20 x Candle Shells